I also have the Exquisite Midis and have heard the Reference 1A & 1D in a couple of different settings. My room is approximately 14 x 22 and if I had a bigger room I would consider them also. There are a few aspects that I could think of off the top of head that provide insite to the major differences:
1) The 1A/1D have more of an ease of (effotless) presentation. The one aspect I really love about them.
2) The bass presentation is different. The bigger driver moves more air (in my mind) and thus creates a different/more of an impact.
3) Based on #2, the amp choices seem to be easier since the Midis would seem to benefit from having a didicated lower frequecy amp. (I am only speculating here as I am currently trying to determine if similar bass impact can be achieved by trying different configurations)
4) The room size and treatments will be a large aspect in dictating sonic differences and performance. Depending on how your room measures sonically now, it may (probably) will have to change.
These are just a few off the top of my head, and of course my own opinion (FWIW). Hopefuly someone else can provide some insight.
1) The 1A/1D have more of an ease of (effotless) presentation. The one aspect I really love about them.
2) The bass presentation is different. The bigger driver moves more air (in my mind) and thus creates a different/more of an impact.
3) Based on #2, the amp choices seem to be easier since the Midis would seem to benefit from having a didicated lower frequecy amp. (I am only speculating here as I am currently trying to determine if similar bass impact can be achieved by trying different configurations)
4) The room size and treatments will be a large aspect in dictating sonic differences and performance. Depending on how your room measures sonically now, it may (probably) will have to change.
These are just a few off the top of my head, and of course my own opinion (FWIW). Hopefuly someone else can provide some insight.